Experiments on Photosynthesis

Given below is the figure of an experimental set-up, showing a physiological act of the plants. Study and answer the following questions:

1. What is the objective of this experiment?
2. Name and define the process shown here.
3. Why do we destarch the leaves before performing the experiment?
4. How do we destarch the leaves?
5. What will be the observation when we pour iodine solution over the bleached experimental leaf?
6. Write a well-balanced equation for the above process.

Name the following:

The green colouring matter of the plants.

Two healthy green plants were placed in the dark for 24 hours. They were then set up, as shown in the figure, for 4 hours. Then a leaf was taken from each plant and
the chlorophyll was removed from the leaves:
( i) What is the next and final step in this experiment?
( ii ) What would be the results of the final step?
( iii ) Why was it necessary to grease the glass sheet?
( iv ) What hypothesis is being tested in this experiment?

How do non-green plants such as fungi and bacteria obtain their nourishment?

Name two aquatic plants which can be used for the experiment of photosynthesis.

A healthy oat seeding in a pot is transferred from light to any airy but completely dark room. How would it differ from its original condition in appearance after about a week? Explain the difference.

Fill in the blank:
Land plants obtain their carbon dioxide from the ______.

Given below is the diagram of an experimental set-up (final stage). Study the same and answer the following questions:

1. What is the main aim of the experiment?
2. Oxygen gas shown in the experiment is released from which of the raw materials?
3. How would you confirm the presence of oxygen gas?
4. Name the chemical substance which can be added in water to enhance the process/rate of release of oxygen gas.
5. Draw a neat and labelled diagram of the same experiment for its initial stage.